Abstract
Isolation technology has been successfully applied in seismic migration. With increasing of seismic demand, seismic performance of isolation structures subjected to very-rare earthquakes need further improvement. However, the isolation layer generally lacks sufficient deformation ability under very-rare earthquakes due to the deformation limit of classical isolation bearing. In order to circumvent the difficulty, this paper develops two new isolation bearings, namely super-large displacement rotation friction pendulum bearing (SLDRFPB) and super-large displacement translation friction pendulum bearing (SLDTFPB). By setting spherical shells with large span and large radius, large horizontal displacement and small horizontal stiffness can be achieved. Safety of the isolation layer and the isolation effect of the superstructure can be greatly improved. SLDTFPB differs from SLDRFPB in the motion state of the superstructure and space utilization of the isolation layer, thus SLDRFPB and SLDTFPB are suitable for structures with different requirements. Due to rotation of the superstructure with SLDRFPB or sliding frames in SLDTFPB, the traditional design method of friction pendulum bearing is no longer suitable. We present a new procedure to accurately and conveniently evaluate seismic performance of two developed bearings. Numerical simulation shows that the seismic response of both the superstructure and isolation layer is small. Developed SLDRFPB and SLDTFPB have sufficient emergency capacity and isolation resilience when subjected to very-rare earthquakes.
Highlights
Earthquake is a main threat of buildings in their lifecycle
The goal of this paper is to develop innovative FPB, namely “super-large displacement rotation friction pendulum bearing” (SLDRFPB) and “super-large displacement translation friction pendulum bearing” (SLDTFPB) to realize large deformation of the isolation layer and to achieve isolation safety subjected to very-rare earthquakes
This paper developed super-large displacement rotation friction pendulum bearing and super-large displacement tradition friction pendulum bearing to isolate very-rare earthquakes
Summary
Earthquake is a main threat of buildings in their lifecycle. With increasing of seismic demand, destruction of buildings, especially buildings with important functions such as hospitals, power stations and landmark buildings, is necessary to avoid. FPB with variable stiffness or variable friction coefficient is effective for a wide variety of structures and isolator properties, even when subjected to near-fault ground motions [30,31,32,33,34] Other isolation devices such as marble-graphite slide seismic isolator [35], polymeric bearings [36] and thermal isolation made of mineral wool and polyurethane foam [37,38] have been proposed. These previous studies indicate the mechanical properties and isolation effect of classic or developed FPBs instead of safety of the isolation layer when subjected to rare earthquakes. To demonstrate good seismic performance of SLDRFPB and SLDTFPB when subjected to rare and very-rare earthquakes
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
